Line b and h because to find radius it half of the diameter of STRAIGHT lines
If you look at the model RM is the same length as PM. PM=10 so RM=10.
Answer:
57 inches
Step-by-step explanation:
The height, width, and diagonal of the TV screen form a right triangle.
Use the pythagorean theorem, a² + b² = c², and solve for c, the hypotenuse/diagonal of the TV.
a² + b² = c²
30² + 48² = c²
900 + 2304 = c²
3204 = c²
56.6 = c
Round this to the nearest inch:
56.6
= 57
So, the diagonal of the TV screen is 57 inches
The correct answer should be :
Option 3 : 
Hope this helps,
Davinia.
